linux-kernel - Re: [PATCH 02/48] staging/lustre/obdclass: restore lu

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Date:	Tue, 23 Jul 2013 13:52:29 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	"Dilger, Andreas" <andreas.dilger@...el.com>
Cc:	Peng Tao <bergwolf@...il.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Peng Tao <tao.peng@....com>
Subject: Re: [PATCH 02/48] staging/lustre/obdclass: restore lu_ref

On Tue, Jul 23, 2013 at 08:31:15PM +0000, Dilger, Andreas wrote:
> On 2013/07/23 1:37 PM, "Greg Kroah-Hartman" <gregkh@...uxfoundation.org>
> wrote:
> 
> >On Tue, Jul 23, 2013 at 12:06:23AM +0800, Peng Tao wrote:
> >> lu_ref.[ch] were mistakenly removed by coan2. Add them back and guard
> >> with CONFIG_LUSTRE_DEBUG_LU_REF_CHECK.
> >
> >Ick, why?  Why not use the in-kernel infrastructure for this type of
> >thig, _iff_ you really need it.
> >
> >Why do you need this at all, isn't the reference code fully debugged by
> >now, given that this has been running for years?  I would only expect to
> >see something like this in new code that is still being developed.
> 
> Lustre is still being developed, so it is useful to be able to enable this
> debugging to catch any new problems that are introduced.

Ok, then use the in-kernel infrastructure for this type of thing, don't
roll your own and add custom stuff that will later just have to be
ripped out and converted to use the in-kernel stuff.

thanks,

greg k-h
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